Pump



March 1, 1932. A DQURSON 1,847,236

PUMP

Filed March 14, 1929 2 Sheets-Sheet l {M QM IN VEN TOR.

A TTORNEY$ March 1, 1932. DOURSON 1,847,236

PUMP

- Filed March 14, 1929 2 Sheets-Sheet 2 INVENTOR. 2 2:? .v'!)

ATTORNEYS Patented Mar. 1, 1932 UNITED STATES PATENT OFFICE LOUIS A. D'OURSON, OF CINCINNATI, OHIO, ASSIGNOR TO THE AMERICAN PULL! I &; TANK 00., OF CINCINNATI, OHIO, A CORPORATION OF OHIO PUMP Application filed March 14, 1929. Serial No.'347,016.

My invention relates to liquid dispensing apparatus andmore particularly to a double acting pumping unit for same.

One'of the objects of my invention is to I provide a two-part horizontally divided casing for the unit adapted tocontain and enclose all the valvesrand other mechanism necessary for speedy and'efiicient pumping of the fluid dispensed. Such construction lowers 1Q production and maintenance expense and insures a high concentration of mechanism in which all working parts are enclosed andyet are readily accessible. The mechanism of each part of the casing is completely assem- 15. bled with its part and the parts then united.

All working parts being enclosed are protected from corrosion and accumulation of dust and dirt. In devices of this kind it has been customary to provide a foot valve at the 20 suction end of the inlet conduit from storage or somewhere in the suction line, and consequently a replacement or repair of the valve was difliculta The foot valve of my device is within the pumping unit itself and may be 25 easily and speedily repaired or replaced.

Another object of my invention is to provide a piston which will be capable of efi'ecs tive pumping even after extremely long and hard periods of use. I accomplish this obs'o'ject by substituting a metal piston ring for the piston leathers heretofore used. The almost indefinite life of these rings insures cons tinued eflective operation of the pump,

. whereas piston leathers harden and crack or 3!! otherwise deteriorate quickly from impurities in the gasolene and require replacement at brief intervals. v I

In the particular embodiment of my invention selected for illustration,

Fig. 1 is a section on the lines 11 of Fig. 2, the valves, the plunger and attendant parts being shown in full, and part of the pump handle broken away,

Fig. 2 is a top plan View with-certain of the interior parts shown in dotted lines, c

Fig. 3 is a perspective of the pumping unit, the operating handle being broken in parts,

Fig. 4, a detail, is a sectionthrough the piston and connecting rod, and 50 Fig. 5, a detail, is a section through a por manner. An inlet connection 5 threaded into the bottom of the lower part of the casing 3 forms a fluid passage controlled by a foot valve 6-, which may be assembled from outside 60 the casing. A butterfly guide 7 integral with the valve 6 insures correct seating and a stop 8 formed by the casing element 3limits the valves upward movement. 1

v The intake valves 9 and 10 carrying butterfly guides 11 and 12 respectively are limited in their upward movement by stops 13 and 1A respectively, the latter stop formed by the casing element 2. The dischargevalves 15 and 16 carrying butterfly guides'17" and 18 respectively are limited in their upward movement by stops 19 and 20, formed by the casing element 2. Each ofv the valves 6, 9, 10, 15 and 16 is adapted to make fluid tight contact. with its seat 21, 22, 23, 24' and respectively, seats 22, 23 and 24 being formed in the casing element 3. The valve 6 has its seat 21 formed on the inlet connection 5 and valve 16 has its seat 25 formed on the seat ring 55, threaded into the casing element 2. 7 Valve 16 is assembled outside the casing and is readily accessibleby merely removing the upper casing member 2.

A pipe cap 26. normally closes the drainage nipple 27 in the bottom of the casing. A brass lining tube 28 is secured within the cylinder 29. I

The piston 30 with an integral guide 31 is guided in guide 32 which is screwed into the bottom of the casing element 3. A screw plug 33 closes the opening at the end of the guide 32.

The piston 30 has on one side an opening 34 through which passes the piston pin 36. On the opposite side is a cylindrical recess 35 to receive the inner end of the piston pin. A metal piston ring 39 is placed in the recess 40 in the piston 30 and holds the pin in place.

The piston pin 36 passes through the forked connecting rod 41 securing it to the piston 30 for reciprocation. A crank pin 42 secured in position by a cotter pin 43 rotatively secures the crank 44 to the connecting rod 41. The drive shaft 45 passing through the easing is secured to the crank 44 and secured against rotation in the crank by the key 46 and set screw 56. The stuffing-box 47 with packing 48 surrounds the shaft 45 preventing leakage. A pump handle 49 secured to the outer end of the drive shaft 45 is provided for oscillation. A lug 57 on the crank 44 .is adapted to contact with lugs 58 and 59 in the casing member 2 limiting movement of the.

crank and piston.

The operation of the unit is as follows: When the pump is at rest or not in operation and the pump full of liquid to be pumped, the valves are all seated. When the pump handle is oscillated and the piston rises, the valves 6, 9 and 16 open and liquid enters through the inlet conduit 5, passing through the channel 50 formed in the casing, and by the valve 9 into the lower part of the cylinder. At the same time liquid passes out of the upper part of the casing through the valve 16 and discharge outlet 51 into the delivery pipe 60. During this part of the operation the valves 10 and 15 remain seated by gravity and the pressure of liquid above them. When the piston has reached the limit of its upward reciprocation and begins to descend, the valves 6, 10 and 15 are open and liquid flows through the inlet 5 past valve 6, through channel 52 and past the valve 10 into the upper part of the cylinder, while the liquid in the lower part of the cylinder is forced through the passage 53 past the valve 15 into passage 54 and out the discharge outlet 51. During this downward stroke of the piston, the valves 9 and 16 remain seated preventing liquid from the lower end of the cylinder circulating to the part above the piston. The foot valve 6 is provided in the pumping unititself obviating its necessity at the suction end of the inlet pipe in the storage tank (not shown).

I claim as my invention and desire to secure by Letters Patent of the United States:

1. A single cylinder double acting reciprocating-piston pump, having in combination, a cylinder whose top end is open and suction and discharge passages all formed in a pump body made in two parts, said parts united on a line transverse of the axis of said cylinder, means for securing said parts together, an inlet and an outlet opening in said body, valves opening toward said outlet opening to control the flow of liquid pumped by said structure, the seats of one inlet and one outlet valve being in upper end of the lower part of the body, the upper part of the body formed to serve as a stop for each of said valves and as the enclosure for the outlets of said valves, a piston for said cylinder, a crank within said body inder to the top of said lower section, an outlet in the upper section of said casing, a passage formed in said upper section forming a continuation of said outlet passage in said lower section and connecting with said outlet, a chamber formed in said upper section in communication with the open end of said cylinder and the upper end of said inlet passage in sa1d lower section and'also the outlet in sa1d casing,'a piston in said cylinder, a crank within sa1d chamber 1n sa1d-upper section, a connecting rod operatively securing sa1d crank to said piston and means for operating said crank.

3. A double acting single cylinder reciprocating piston'pump having in combination a horizontally divided casing including an upper casing member and a lower casing member, an inlet connection removablysecured in the lower casing member and a foot valve controlling the flow of liquid through the inlet, a seat on said inlet connection for said foot valve, a pump cylinder in said lower casing v member, an intake valve in the lower part of" said cylinder, a seat in said cylinder for said intake valve, a fluidpassagefrom sa1d foot valve to said intake valve formed in said-lower casing member, a second intake valve in;

the upper part of said lower casing member and a seat on the top of said member for said valve, a fluid passage from said foot valve to said second intake valve formed in said lower casing member, a discharge valve in the upper part of said lower casing member substantial- 1y diametrically opposite said second intake valve anda seat on the top of said lower casing member for said discharge valve, a fluid passage from the lower part ofsaid cylinder to said discharge valve formed in said lower casing member, an outlet in said upper casing member, a fluid passage from said discharge valve to said outlet formed in said upper casing member, a removable valve seat ring in said upper casing member and a valve seat on said ring, a second discharge valve seating on the seat on said ring, a fluid passage from said second intake valve to said second discharge valve formed in said upper casing member, a fluid passage-from said second discharge valve to said outlet formed in said upper casing member, a piston reciprocating in said cylinder and means for reciprocating said piston.

4. A single cylinder double acting reciproeating pump, having in combination, a cylinder Whose top end is open and suction and discharge passages all formed in a pump body made in two parts, said parts united on a line transverse of the axis of said cylinder, means for securing said parts together, an inlet and an outlet opening to control the How of liquid pumped by said pump, and means for actuating said crank, the upper part of the body having a cavity connecting with the open top end of said cylinder, said cavity forming an enclosure for said crank.

In testimony whereof I have hereunto set my hand.

LOUIS A. DOURSON. 

